Controlled growth of thermally stable uniform-sized Ag nanoparticles on flat support and their electrochemical activity

Ansari, Anees A.; Sartale, Shrikrishna D.

doi:10.1007/s00339-014-8981-3

Cited by 19 publications

(18 citation statements)

References 34 publications

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“…We believe that for higher reduction times, there is no nucleation and/or growth of Ag nanoparticles. Also, the grown Ag nanoparticles are well stable in HyH solution …”

Section: Resultsmentioning

confidence: 89%

“…These results suggest that with increase in reduction time, the coverage density of Ag nanoparticles is increasing, but the change in the average size is negligible. The intensities of the LSPR peaks remain unchanged for 120 s and higher reduction times indicating the complete reduction of all adsorbed Ag + ions at 120 s . Further increase in the reduction time after 120 s affects neither the positions nor the intensities of the LSPR peaks.…”

Section: Resultsmentioning

confidence: 92%

“…For example, only dipole plasmon oscillations contribute to LSPR peak for smaller and highly spherical MNPs, whereas, quadruple plasmon oscillations contribute to LSPR peak for larger nonspherical MNPs at relatively higher energy than dipole oscillations . UV–Vis spectroscopy can be utilized to observe change in LSPR peak due to variation in size, shape, and/or dielectric environment of the MNPs . Optimization of the reduction time was done while keeping concentrations of the AgNO 3 (0.01 M) and HyH (0.1 M), adsorption time (10 s), rinsing time (15 s), and number of the growth cycles (5) constant.…”

Section: Resultsmentioning

confidence: 99%

“…These multiple dipole plasmonic peaks are might be due to wide size distribution of Ag nanoparticles. The most intense peak at 436 nm is indicative of dominant contribution from certain most favorable small spherical Ag nanoparticles . Major contribution of the dipole plasmonic peak indicates higher density of spherical Ag nanoparticles comparing to bigger nonspherical nanoparticles which might have formed due to agglomeration of smaller spherical nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

“…Growth of the Ag nanoparticles can thus be expressed according to the following overall reaction

4 AgN O_{3} + N_{2} H_{4} \to 4 Ag + 4 HN O_{3} + N_{2} ↑ .

…”

Section: Methodsmentioning

confidence: 99%

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SILAR grown Ag nanoparticles as an efficient large area SERS substrate

Shaikh

Sartale

2018

J Raman Spectroscopy

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Ag nanoparticles having different size and coverage are grown on large area glass substrate (~10 cm2) using low cost successive ionic layer adsorption and reduction (SILAR) method. The SILAR parameters, such as reduction time and growth cycles are optimized to grow Ag nanoparticles with appropriate size and coverage showing maximum surface enhanced Raman scattering (SERS) enhancement of Rhodamine 6 G(R6G). For fixed growth cycles, the size and the coverage of the grown Ag nanoparticles are found to increase with the reduction time and then saturate. The size and coverage of the grown Ag nanoparticles monotonically increase with growth cycles. However, for higher growth cycles, the shape of Ag nanoparticles could not maintain their sphericity and became rock shaped/nonspherical particles, giving rise to intense quadruple plasmon resonance. The growth mechanism is proposed. Further, SERS activity of the grown Ag nanoparticles is studied for an industrial pollutant methylene blue (MB). The observed SERS enhancement factor (~109) for MB is much higher than the reported values in literature. Measured relative standard deviations values of Ag nanoparticles grown with optimum SILAR parameters suggest the excellent homogeneity and reproducibility of the SERS signal.

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“…We believe that for higher reduction times, there is no nucleation and/or growth of Ag nanoparticles. Also, the grown Ag nanoparticles are well stable in HyH solution …”

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Growth of the Ag nanoparticles can thus be expressed according to the following overall reaction

4 AgN O_{3} + N_{2} H_{4} \to 4 Ag + 4 HN O_{3} + N_{2} ↑ .

…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

SILAR grown Ag nanoparticles as an efficient large area SERS substrate

Shaikh

Sartale

2018

J Raman Spectroscopy

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Spin coated Ag NPs SERS substrate: trace detection study of methylene blue and melamine

Shaikh

Sartale

2023

Appl. Phys. A

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Spin-Coated Ag NPs SERS Substrate: Role of Electromagnetic and Chemical Enhancement in Trace Detection of Methylene Blue and Congo Red

et al. 2022

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This work demonstrates a simple low cost and reproducible spin coating method followed by thermal reduction for the uniform growth of silver nanoparticles (AgNPs) as surface enhanced Raman scattering (SERS) substrate. In this work, cationic dye MB and anionic dye CR are selected as two different kinds of SERS probe molecules to investigate the differences between EME and CE mechanism. The results indicate that SERS spectra of MB molecule on AgNPs SERS substrate exhibit the shift in the Raman peak positions and high sensitivity (LOD ~ 10 -10 M) with large GSERS (~ 10 9 ) value, which can be attributed to the contribution from both EME and CE mechanism. It is found that Clhalide ions present in the MB molecule are forming surface complex (AgNPs@Cl -) on the surface of AgNPs SERS substrate which is confirmed by the XPS investigation, which might be responsible for the CE enhancement in MB molecule.Whereas Congo red being anionic dye showed no shift in Raman peak positions and less sensitivity (LOD ~10 -8 ) with GSERS (~ 10 7 ) value on AgNPs SERS substrate, which can be attributed to EME mechanism only. The obtained results suggest that Clhalide ions present in the MB molecule plays important role by giving large SERS enhancement for MB molecule on AgNPs SERS substrate. It is expected that this work will provide insight into role of EME and CE mechanisms for cationic dye MB and anionic dye CR.

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Controlled growth of thermally stable uniform-sized Ag nanoparticles on flat support and their electrochemical activity

Cited by 19 publications

References 34 publications

SILAR grown Ag nanoparticles as an efficient large area SERS substrate

SILAR grown Ag nanoparticles as an efficient large area SERS substrate

Spin coated Ag NPs SERS substrate: trace detection study of methylene blue and melamine

Spin-Coated Ag NPs SERS Substrate: Role of Electromagnetic and Chemical Enhancement in Trace Detection of Methylene Blue and Congo Red

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